Published 02/03/2014 | 21:06
The thought of jumping into a freezing lake would send many of us running to the hills.
New Tonight Show host Jimmy Fallon looks traumatised after participating in the annual Polar Plunge in Chicago.
Our images show him looking frozen as he came out of a freezing Lake Michigan.
Fallon's endeavour comes after he invited Chicago mayor Rahm Emanuel onto his show.
Emanuel said he would if Fallon participated in the Polar Plunge - a fundraising event for the city's Special Olympics.
Fallon agreed - and made good on his promise earlier today.
Wearing a suit, he took the plunge with a wetsuit clad Rahm.